3 Geiser is a generic Emacs/Scheme interaction mode, featuring an
4 enhanced REPL and a set of minor modes improving Emacs' basic scheme
5 major mode. The main functionalities provided are:
7 - Evaluation of forms in the namespace of the current module.
10 - Namespace-aware identifier completion (including local bindings,
11 names visible in the current module, and module names).
12 - Autodoc: the echo area shows information about the signature of
13 the procedure/macro around point automatically.
14 - Jump to definition of identifier at point.
15 - Access to documentation (including docstrings when the
16 implementation provides it).
17 - Listings of identifiers exported by a given module.
18 - Listings of callers/callees of procedures.
19 - Rudimentary support for debugging (list of
20 evaluation/compilation error in an Emacs' compilation-mode
22 - Support for inline images in schemes, such as Racket, that treat
23 them as first order values.
25 NOTE: if you're not in a hurry, [[http://www.nongnu.org/geiser/][Geiser's website]] contains a much
30 Geiser needs Emacs 23.2 or better, and at least one of the
31 supported scheme implementations:
32 - Guile 2.2 or better.
33 - PLT Racket 6.0 or better.
34 - Chicken 4.8.0 or better.
35 - MIT/GNU Scheme 9.1.1 or better.
36 - Chibi 0.7.3 or better.
41 The easiest way is to use MELPA, and just type
42 =M-x package-install RET geiser= inside emacs.
44 Geiser can be used either directly from its uninstalled source tree
45 or byte-compiled and installed after performing the standard
46 configure/make/make install dance. See the INSTALL file for more details.
49 These steps are necessary to fully support Chicken Scheme, but are
50 not required for any other scheme.
52 - Install the necessary support eggs:
54 $ chicken-install -s apropos chicken-doc srfi-18 srfi-1
56 - Update the Chicken documentation database:
58 $ cd `csi -R chicken.platform -p '(chicken-home)'`
59 $ curl https://3e8.org/pub/chicken-doc/chicken-doc-repo-5.tgz | sudo tar zx
63 These steps are necessary to fully support Chicken Scheme, but are
64 not required for any other scheme.
66 - Install the necessary support eggs:
69 $ chicken-install -s apropos chicken-doc
72 - Update the Chicken documentation database:
75 $ cd `csi -p '(chicken-home)'`
76 $ curl http://3e8.org/pub/chicken-doc/chicken-doc-repo.tgz | sudo tar zx
81 The loading invocations above install all supported Scheme
82 implementations. You can list explicitly the ones that you want by
83 setting the variable =geiser-active-implementations= *before* loading
84 geiser.el. For instance:
87 (setq geiser-active-implementations '(chicken guile))
90 On opening a scheme file, Geiser will try to guess its Scheme,
91 defaulting to the first in the list. Use =C-c C-s= to select the
92 implementation by hand (on a per file basis).
94 Check the geiser customization group for some options with:
97 M-x customize-group RET geiser RET
100 In particular, customize =geiser-<impl>-binary=, which should point
101 to an executable in your path.
103 To start a REPL, =M-x geiser=.
105 ** Completion with company-mode
107 Geiser offers identifier and module name completion, bound to
108 =M-TAB= and =M-`= respectively. Only names visible in the current
111 While that is cool and all, things are even better: if you have
112 [[http://company-mode.github.io/][company mode]] installed, Geiser's completion will use it. Just
113 require company-mode and, from then on, any new scheme buffer or
116 * Quick key reference
118 ** In Scheme buffers:
120 |-------------+--------------------------------------------------|
121 | C-c C-s | Specify Scheme implementation for buffer |
122 | C-c C-z | Switch to REPL |
123 | C-c C-a | Switch to REPL and current module |
125 |-------------+--------------------------------------------------|
126 | M-. | Go to definition of identifier at point |
127 | M-, | Go back to where M-. was last invoked |
128 | C-c C-e m | Ask for a module and open its file |
129 | C-c C-e C-l | Add a given directory to Scheme's load path |
130 | C-c C-e [ | Toggle between () and [] for current form |
132 |-------------+--------------------------------------------------|
133 | C-M-x | Eval definition around point |
134 | C-c C-c | Eval definition around point |
135 | C-c M-e | Eval definition around point and switch to REPL |
136 | C-x C-e | Eval sexp before point |
137 | C-c C-r | Eval region |
138 | C-c M-r | Eval region and switch to REPL |
139 | C-c C-b | Eval buffer |
140 | C-c M-b | Eval buffer and switch to REPL |
142 |-------------+--------------------------------------------------|
143 | C-c C-m x | Macro-expand definition around point |
144 | C-c C-m e | Macro-expand sexp before point |
145 | C-c C-m r | Macro-expand region |
147 |-------------+--------------------------------------------------|
148 | C-c C-k | Compile and load current buffer |
149 | C-c C-l | Load scheme file |
150 | C-u C-c C-k | Compile and load current buffer, restarting REPL |
152 |-------------+--------------------------------------------------|
153 | C-c C-d d | See documentation for identifier at point |
154 | C-c C-d s | See short documentation for identifier at point |
155 | C-c C-d i | Look up manual for identifier at point |
156 | C-c C-d m | See a list of a module's exported identifiers |
157 | C-c C-d a | Toggle autodoc mode |
159 |-------------+--------------------------------------------------|
160 | C-c < | Show callers of procedure at point |
161 | C-c > | Show callees of procedure at point |
163 |-------------+--------------------------------------------------|
164 | M-TAB | Complete identifier at point |
165 | M-`, C-. | Complete module name at point |
166 | TAB | Complete identifier at point or indent |
167 | | (If geiser-mode-smart-tab-p is t) |
168 |-------------+--------------------------------------------------|
172 |-------------+----------------------------------------------------|
173 | C-c C-z | Start Scheme REPL, or jump to previous buffer |
174 | C-c M-o | Clear scheme output |
175 | C-c C-q | Kill Scheme process |
176 | C-c C-l | Load scheme file |
177 | C-c C-k | Nuke REPL: use it if the REPL becomes unresponsive |
179 |-------------+----------------------------------------------------|
180 | M-. | Edit identifier at point |
181 | TAB, M-TAB | Complete identifier at point |
182 | M-`, C-. | Complete module name at point |
183 | M-p, M-n | Prompt history, matching current prefix |
185 |-------------+----------------------------------------------------|
186 | C-c C-m | Set current module |
187 | C-c C-i | Import module into current namespace |
188 | C-c C-r | Add a given directory to scheme's load path |
190 |-------------+----------------------------------------------------|
191 | C-c C-d C-d | See documentation for symbol at point |
192 | C-c C-d C-m | See documentation for module |
193 | C-c C-d C-a | Toggle autodoc mode |
194 |-------------+----------------------------------------------------|
196 ** In the documentation browser:
198 |----------+----------------------------------------------|
200 | b | Previous page |
202 |----------+----------------------------------------------|
203 | TAB, n | Next link |
204 | S-TAB, p | Previous link |
206 | P | Previous section |
208 |----------+----------------------------------------------|
209 | k | Kill current page and go to previous or next |
210 | g, r | Refresh page |
211 | c | Clear browsing history |
213 |----------+----------------------------------------------|
214 | ., M-. | Edit identifier at point |
215 | z | Switch to REPL |
217 |----------+----------------------------------------------|
219 |----------+----------------------------------------------|
221 ** In backtrace (evaluation/compile result) buffers:
223 - =M-g n=, =M-g p=, =C-x `= for error navigation.
224 - =q= to bury buffer.